Sól or Sunna is the Sun personified in Germanic mythology. One of the two Old High German Merseburg Incantations, written in the 9th or 10th century CE, attests that Sunna is the sister of Sinthgunt. In Norse mythology, Sól is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson.

A solar deity or sun deity is a deity who represents the Sun or an aspect thereof. Such deities are usually associated with power and strength. Solar deities and Sun worship can be found throughout most of recorded history in various forms. The Sun is sometimes referred to by its Latin name Sol or by its Greek name Helios. The English word sun derives from Proto-Germanic *sunnǭ.